1.Aniti-fog ,Anti-scratch Double PC len 2.Good adjustable system 3.Faster release buckle * Adult fit* Frame : soft PC, helmet compatible* Lens: silver coating, spherical double lens, permanent anti-fog, Impact and Scratch resistant UV protection*Foam : soft 3 layer* Strap :adjustable DEX strap . faster release buckleFeature1.Soft PC material ,free to fold, helmet compatible 2.silver coating, ...